Endorphin.es Grand Terminal silver is a digital multifunction module for modular synthesizers in Eurorack format. The two function generators of the module can be used as envelopes, LFOs or with some restrictions as VCOs. It has two filter channels with eight filter types each, various mixing and routing functions and a multi-effects unit. Endorphin.es Grand Terminal is based on an ARM M4 DSP processor, processing audio signals at 48KHz/16 bit. Depending on the settings, the Grand Terminal silver can be used both as part of a synthesizer voice and as a general mono or stereo signal processor with effects unit.
Function generators
The two function generators can be operated as AD or AR, the time constants can be set between one millisecond and 10 seconds, with variable waveform (exp->lin->log). Time and waveform are also voltage controllable and this module has "End or Stage" outputs. When the module is running in loop mode, the function generators can be played chromatically as LFOs or VCOs in a range of about 6.5 octaves.
Filter channels
The filter channels of the Grand Terminal can be connected in parallel or in series. In addition, there is a link mode for processing stereo material. For each of the two filters, one of eight models can be selected using the assigned buttons. These are adjustable, both manually and by control voltage. The models are: Transistor Ladder Filter (low-pass), Diode Ladder Filter (low-pass), Vactrol Low-Pass Gate, Resonant Vactrol Low-Pass Gate, State Variable Low-Pass Filter, State Variable High-Pass Filter, State Variable Band-Pass Filter, Comb Filter.
Multi-effects section
The multi-effects section offers eight algorithms that are adjustable in their mixing ratio to the original, as well as in two parameters each. The algorithms are: HallReverb , Shimmer Reverb, Room Reverb, Plate Reverb, Spring Reverb, Ping-Pong Delay, Tape Delay and Chorus. Volume and pan can also be adjusted per channel manually and via control voltage, where high volume settings can be used to create distortion.